Sifting device



(No Model.) T. F. CRARY. SIPTING DEVICE.

No. 453,235. Patented June 2; 1891.

In V5.77 far UNITED STATES PATENT OFFICE.

THOMAS FREDERICK CRARY, OF MIDDLEPORT, OHIO.

SlFTlNG DEVICE.

SPECIFICATION forming part of Letters Patent No. 453,235, dated June 2, 1891.

Application filed December 22, 1890- Serial No. 376,438- (No model.)

To all whom it may concern:

Be it known that- I, THOMAS FREDERICK.

(JRARY, a citizen of the United States, residing atMiddleport, in the county of Meigs and State of Ohio, have invented certain new and useful Improvements in Sifting Devices; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings and to the figures of reference marked thereon, which form a part of this specification.

The subjectof thisinvention is a device for sifting pulverized substanceslike flour, for instance-an'd, in combination with this device, a storage or supply bin superposed upon the former.

The improvements here in view relate partioularly to the mode of placing and operating the sieve and to the general construction of the parts, special care being taken to arrange them in a manner whereby their shipping is facilitated.

The invention is fully explained in the following specification and illustrated in the accompanying drawings, in which Figure 1 is a front view of the device partly open. Fig. 2 is a side view of the same as it appears while being operated. Fig. 3 is a vertical section through the lower part, taken at line 3 3 of Fig. 1. Fig. 4. is a perspective view of the door removed. Fig. 5 is a top view of the sieve detached, relative position of the lower end of the bin being shown in dotted lines.

Sifter S and bin 9 consist, substantially, of two frustum or funnel shaped main bodies, preferably of sheet metal. Their smaller ends engage with each other in the manner shown, the smaller end of the bin reaching some distance in and below the upper edge of the narrow end of the body ofthe sifter.

10 is a lid whereby the upper end of the bin is closed.

Access to the sifter is had by an opening, substantially semicircular in form, which may be closed by a sliding door 11.

In cutting the opening in the body 8 sufficient of the metal is left below this opening at 12 for the purpose of providing an annular flange 13, which is formed by turning in the lower edge of the body, said-edge or flange engaging witha groove 14 cutin the edge of floor 15, and serves as a means tokeep the latter in place. A single screw 16, passing through the overlapping ends 12 into the edge of the floor, completes the connection and prevents flange 13 from disengagement with groove 14- 17 is the sieve suspended by two hooked bearings 18, which engage with two pivots 19, extending out near the lower edge of bin 9. At the front part of the sieve at a point at right angles to the axis is a loop 20, on which handle 21 is loosely confined by means of an eye 22. This arrangement provides a vertical movement of the sieve which causes the material to be alternately thrown up and down against it, attacking it more energetically, and is therefore more expeditious and far preferable to an even movement in a horizontal plane Where the material is rolled to and fro and easily balled. The loose handle imparts to the shaking movement of the sieve a peculiar jerky and abruptly changing irregular motion independent from the movement of the handle, which greatly facilitates the sifting operation. lVith a rigid handle the movement will be more even and regular and not effect the material so readily, particularly when the latter is balling or sticking together.

From front to rear through the sieve and at right angles to the axis of its motion runs a wire 24, supporting two pieces of rubber 25 in such a position as to cause thein to strike alternately the lower edge of the bin. (See Fig. 5 and dotted lines in Fig. 2.) On account of their elasticity these rubber pieces when striking cause the sieve to recoil with a shock, which greatly aids in separating the material if balled.

26 is a valve bywhich the sieve is supplied from the bin. It is operated by a handle 27, which has a joint to permit it of being folded when the valve is closed, so as not to interfere with the closing of the door 11. This valve is shown by dotted lines in its extreme positions in Figs. 1 and 2. The door consists of a piece of sheet metal somewhat larger than the opening, and has square corners and the same taper and curvature as the body 8. Two wire rings 28 and 29 conneet to its upper and loweredges, corresponding in diameter with the inside diameter of the body 8 at those points and serving as guides for the door, which latter rests on lloor 15, and is retained in its position between said floor and the upwardly-tapcring body 8 of the sitter.

30 is a knob on said door, serving also as a stop to limit the formers movements.

31 is a vessel receiving the sifted material, while for the purpose of removing the coarser parts remaining in the sieve the latter is unhooked from its supporting-pivots 19.

For shipping purposes bin 9 is taken off the body of the sitter 8, resting only loosely thereon, and a quantity of them may be nested. The floors are separated by loosening screw 16 and spreading parts 12 of body 8, which causes the disengagement of flange 13 from groove 14: in the edge of the floor. These latter may then be packed or erated flatwise in large quantities.

Having described my invention, I claim as new- 1. In a sitter, the combination, with a main body or supporting-shell, of a sieve pivotally suspended therein and having a handle connected to the sieve at right angles to the axis of its motion, giving it thereby an up-anddown movement, the connecting end of which is movable on the sieve, so as to make part of the latters movement independent from the one of the handle, whereby an irregular and jerky movement is obtained, all as substantially shown and described.

2. In a sitter, the combination, with a main body or supporting-shell, of a sieve pivotally suspended therein and having an elongated loop secured to it, and a handle loosely and movably detained on said loop, so as to make part of the movement of the sieve independent from the one of the handle, said loop being connected to the sieve at right angles to the axis of its motion, whereby an irregular and jerky up-and-down movement is obtained, all as substantially shown and de scribed.

3. In a sifter, the combinatiom'with a main body or supporting-shell, of a sieve pivotally suspended therein, a handle the connecting end of which is movable on the sieve, so as to make part of the latters movement independent from the one of the handle, and elas' tic bumpers located in a line with the handle and at right angles to the axis of the motion of the sieve and secured to it in a position to bring them in contact with some lixed part of the device when the sieve is moved to its extreme positions by the handle, causing it to recoil quickly and independent and in advance from the movement imparted by the handle, alias fully shown and described.

l. A sifting device consisting substantially of a sieve pivotally suspended within a supporting body or shell, formed, preferably, of a piece of sheet metal bent to the shape and having its lower edge flan ged or bent inwardly, and a floor grooved in its edge and fitting within the lower end of said shell and engaging with the flange thereat for the purpose of connecting the two, all as substantially shown and described.

5. A sifting device consisting substantially of a sieve pivotally suspended within a supporting body or shell, being of cylindrical shape and tapering inwardly toward its upper end, a floor at the lower end of said body serving as a support for the vessel beneath the sieve for catching the sifted material, and a sliding door to close the opening provided in the shell for the purpose of giving access to the vessel within, said door fitting inside of the shell and held against it and guided by the circular wires 28 and 29, having the same taper and curvature, and, resting with its lower edge on the floor, is kept down and in position by the inwardly-tapering shell, all as fully shown and described.

6. In a combined sifter and storage bin, the construction and combination of two funnel-shaped bodies, one forming the bin, the other containing the sifter and serving as support for the former, which is superposed upon it, the two parts engaging with their smaller ends, and are substantially of the same size and taper, so that when disengaged and reversed they may be placed one upon the other and nested for the purpose of convenient storage and shipping, all as substantially shown and described.

In testimony whereof I affix my'signatu re in presence of two witnesses.

THOMAS FREDERICK ORARY.

Witnesses:

S. P. 00E, W. G. DAVIS. 

